He may be experiencing a mild stomach upset or gastrointestinal irritation causing vomiting despite being active and without fever or cold symptoms.

🩺 Possible Causes

• Gastroenteritis or mild stomach infection without fever
• Food intolerance or reaction to something recently eaten
• Side effect of any medication if he is taking antibiotics like Azifast 500 (which can cause nausea and vomiting)

🏥 What You Should Do

• Keep him hydrated with small sips of water or oral rehydration solution
• Avoid solid food temporarily and reintroduce bland, easy-to-digest foods gradually
• Monitor for worsening symptoms such as persistent vomiting, dehydration, abdominal pain, or fever

⚠️ When to Seek Medical Help

• If vomiting continues beyond 24–48 hours or worsens
• Signs of dehydration (dry mouth, reduced urination, dizziness)
• Development of fever, severe abdominal pain, or lethargy

Consult a general physician or a gastroenterologist promptly to evaluate and manage the cause properly. If he is on antibiotics like Azifast 500, inform the doctor as vomiting could be a side effect needing adjustment.To narrow down potential causes, we will need some more information.Please provide his age and gender.